Winter Solstice 2025. Dong zhi, or winter solstice festival, is an important observance in singapore, where longstanding chinese traditions remain strong. What is the shortest day of the year 2025, when is the longest night?

21, in the northern hemisphere, according to the u.s. The dates given on this page are based on coordinated universal time (utc), which for practical purposes is equivalent to greenwich mean time (gmt).